Thursday, 8 October 2015

What is the difference between Wide and Nonwide tables in SQL Server?


What is the difference between Wide and Non-wide tables in SQL Server?

  • 1) Wide table can contain 30,000 columns, Non-wide table(basic table) can contain only 1024 columns.
  • 2) Wide Tables are considered to be denormalized tables, Non-wide tables are considered to be Normalized tables.
  • 3) Wide tables are used in OLAP systems, Narrow tables are used in OLTP system.
  • 4) Wide table is new feature in SQL Server 2008. To over come the problem of having only 1024 columns in Narrow tables.
  • 5) Wide tables don't work with transnational or merge replication, but Non-wide can work.

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